/*
 * Copyright (c) 2007,2008 INRIA
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation;
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Author: Jahanzeb Farooq <jahanzeb.farooq@sophia.inria.fr>
 */

#include "burst-profile-manager.h"

#include "bs-net-device.h"
#include "mac-messages.h"
#include "ss-manager.h"
#include "ss-net-device.h"
#include "ss-record.h"

#include "ns3/log.h"

#include <stdint.h>

namespace ns3
{

NS_LOG_COMPONENT_DEFINE("BurstProfileManager");

NS_OBJECT_ENSURE_REGISTERED(BurstProfileManager);

TypeId
BurstProfileManager::GetTypeId()
{
    static TypeId tid =
        TypeId("ns3::BurstProfileManager").SetParent<Object>().SetGroupName("Wimax");
    return tid;
}

BurstProfileManager::BurstProfileManager(Ptr<WimaxNetDevice> device)
    : m_device(device)
{
}

BurstProfileManager::~BurstProfileManager()
{
    m_device = nullptr;
}

void
BurstProfileManager::DoDispose()
{
    m_device = nullptr;
}

uint16_t
BurstProfileManager::GetNrBurstProfilesToDefine()
{
    /*
     * 7 modulation types
     */
    return 7;
}

WimaxPhy::ModulationType
BurstProfileManager::GetModulationType(uint8_t iuc, WimaxNetDevice::Direction direction) const
{
    if (direction == WimaxNetDevice::DIRECTION_DOWNLINK)
    {
        std::vector<OfdmDlBurstProfile> dlBurstProfiles =
            m_device->GetCurrentDcd().GetDlBurstProfiles();
        for (std::vector<OfdmDlBurstProfile>::iterator iter = dlBurstProfiles.begin();
             iter != dlBurstProfiles.end();
             ++iter)
        {
            if (iter->GetDiuc() == iuc)
            {
                return (WimaxPhy::ModulationType)iter->GetFecCodeType();
            }
        }
    }
    else
    {
        std::vector<OfdmUlBurstProfile> ulBurstProfiles =
            m_device->GetCurrentUcd().GetUlBurstProfiles();
        for (std::vector<OfdmUlBurstProfile>::iterator iter = ulBurstProfiles.begin();
             iter != ulBurstProfiles.end();
             ++iter)
        {
            if (iter->GetUiuc() == iuc)
            {
                return (WimaxPhy::ModulationType)iter->GetFecCodeType();
            }
        }
    }

    // burst profile got to be there in DCD/UCD, assuming always all profiles are defined in DCD/UCD
    NS_FATAL_ERROR("burst profile got to be there in DCD/UCD");

    return (WimaxPhy::ModulationType)-1;
}

uint8_t
BurstProfileManager::GetBurstProfile(WimaxPhy::ModulationType modulationType,
                                     WimaxNetDevice::Direction direction) const
{
    if (direction == WimaxNetDevice::DIRECTION_DOWNLINK)
    {
        std::vector<OfdmDlBurstProfile> dlBurstProfiles =
            m_device->GetCurrentDcd().GetDlBurstProfiles();
        for (std::vector<OfdmDlBurstProfile>::iterator iter = dlBurstProfiles.begin();
             iter != dlBurstProfiles.end();
             ++iter)
        {
            if (iter->GetFecCodeType() == modulationType)
            {
                return iter->GetDiuc();
            }
        }
    }
    else
    {
        std::vector<OfdmUlBurstProfile> ulBurstProfiles =
            m_device->GetCurrentUcd().GetUlBurstProfiles();
        for (std::vector<OfdmUlBurstProfile>::iterator iter = ulBurstProfiles.begin();
             iter != ulBurstProfiles.end();
             ++iter)
        {
            if (iter->GetFecCodeType() == modulationType)
            {
                return iter->GetUiuc();
            }
        }
    }

    // burst profile got to be there in DCD/UCD, assuming always all profiles are defined in DCD/UCD
    NS_FATAL_ERROR("burst profile got to be there in DCD/UCD");

    return ~0;
}

uint8_t
BurstProfileManager::GetBurstProfileForSS(const SSRecord* ssRecord,
                                          const RngReq* rngreq,
                                          WimaxPhy::ModulationType& modulationType) const
{
    /*during initial ranging or periodic ranging (or when RNG-REQ is used instead of
     DBPC) calculates the least robust burst profile for SS, e.g., based on distance,
     power, signal etc, temporarily choosing same burst profile SS requested in RNG-REQ*/

    modulationType = GetModulationTypeForSS(ssRecord, rngreq);
    return GetBurstProfile(modulationType, WimaxNetDevice::DIRECTION_DOWNLINK);
}

WimaxPhy::ModulationType
BurstProfileManager::GetModulationTypeForSS(const SSRecord* ssRecord, const RngReq* rngreq) const
{
    return GetModulationType(rngreq->GetReqDlBurstProfile(), WimaxNetDevice::DIRECTION_DOWNLINK);
}

uint8_t
BurstProfileManager::GetBurstProfileToRequest()
{
    /*modulation type is currently set by user in simulation script, shall
     actually be determined based on SS's distance, power, signal etc*/

    return GetBurstProfile(m_device->GetObject<SubscriberStationNetDevice>()->GetModulationType(),
                           WimaxNetDevice::DIRECTION_DOWNLINK);
}

} // namespace ns3
